html,body {
	width: 100%;
	height: 100%;
	overflow: hidden;
}

* {
	margin: 0;
	padding: 0;
}

.nav {
	border-right: 1px solid;
	width: 150px;
	position: fixed;
	left: 0px;
	right: 0px;
	top: 0px;
	bottom: 0px;
	z-index: 2;
}

.nav_tree {
	margin-top: 10px;
	padding-left: 10px;
}

.main {
	top: 0px;
	bottom: 0px;
	left: 0px;
	right: 0px;
	position: absolute;
	padding-left: 20px;
	z-index: 1;
}